The clock below will help you. Count the number of hours clockwise (in the direction of the arrow) from the start time to the end time.

Example 1: A.M.

Calculate the difference in hours between the two times.
How many hours between 6:13am and 10:13am?   Hours:

Since the minutes are the same (:13), we only look at the difference between the hours.

Solution: Counting
Using the clock above, we start at 6:00am and count clockwise to 10:00am.

	6:00	am   →   7:00	am   →   8:00	am   →   9:00	am   →  10:00	am
Count:		1 hour	2 hours	3 hours	4 hours

Counting from 6:00am to 10:00am is 4 hours.

Alternate Solution: Subtraction
10:00am - 6:00am = 10 - 6 = 4 hours

The answer is Hours:

Example 2: A.M. and P.M.

Calculate the difference in hours between the two times.
How many hours between 9:00am and 2:00pm?   Hours:

Solution: Counting
Using the clock above, we start at 9:00am and count clockwise to 2:00pm.

	9:00	am   →  10:00	am   →  11:00	am   →  12:00	pm   →   1:00	pm   →   2:00	pm
Count:		1 hour	2 hours	3 hours	4 hours	5 hours

Counting from 9:00am to 2:00pm is 5 hours.

Alternate Solution: Subtraction
From midnight (12:00 am), 9:00 am is 9 hours away.
From midnight (12:00 am), 2:00pm is 14 hours (12 hours + 2 hours) away.
14 hours - 9 hours = 5 hours

The answer is Hours: